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| This example creates a black image of a 3x3 square. It then uses a flood fill iterator to visit the pixels in this white region (specified by a seed point) and marks them with increasing brightnesses to convey the visit order. | | This is a duplicate of this: |
| | | http://www.itk.org/Wiki/ITK/Examples/WishList/Iterators/FloodFilledImageFunctionConditionalIterator |
| ==FloodFillIterator.cxx==
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| <source lang="cpp">
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| #include "itkImage.h"
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| #include "itkImageFileWriter.h"
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| #include "itkFloodFilledImageFunctionConditionalIterator.h"
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| #include "itkBinaryThresholdImageFunction.h"
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| #include "itkImageFileWriter.h"
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| | |
| #include "QuickView.h"
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| | |
| typedef itk::Image< unsigned char, 2 > ImageType;
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| | |
| void CreateImage(ImageType::Pointer image);
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| | |
| int main( int argc, char *argv[])
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| {
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| ImageType::Pointer image = ImageType::New();
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| CreateImage(image);
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| | |
| typedef itk::BinaryThresholdImageFunction< ImageType, double > FunctionType;
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| FunctionType::Pointer function = FunctionType::New();
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| function->SetInputImage(image);
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| function->ThresholdAbove(100); // we are looking to capture 255
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|
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| typedef itk::FloodFilledImageFunctionConditionalIterator< ImageType, FunctionType > IteratorType;
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| | |
| itk::Index<2> seed;
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| seed[0] = 5;
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| seed[1] = 5;
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|
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| std::vector<itk::Index<2> > seeds;
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| seeds.push_back(seed);
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|
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| IteratorType it (image, function, seeds);
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| it.GoToBegin();
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|
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| unsigned int counter = 0;
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| while ( !it.IsAtEnd() )
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| {
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| it.Set(static_cast<float>(counter) * 25.);
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| ++it;
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| counter++;
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| }
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|
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| typedef itk::ImageFileWriter< ImageType > WriterType;
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| WriterType::Pointer writer = WriterType::New();
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| writer->SetFileName("output.png");
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| writer->SetInput(image);
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| writer->Update();
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|
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| ImageType::Pointer originalImage = ImageType::New();
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| CreateImage(originalImage);
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|
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| QuickView viewer;
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| viewer.AddImage(originalImage.GetPointer());
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| viewer.AddImage(image.GetPointer());
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| viewer.Visualize();
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| | |
| return EXIT_SUCCESS;
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| }
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| | |
| void CreateImage(ImageType::Pointer image)
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| {
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| itk::Index<2> start;
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| start.Fill(0);
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| | |
| itk::Size<2> size;
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| size.Fill(10);
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| itk::ImageRegion<2> region(start,size);
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| image->SetRegions(region);
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| image->Allocate();
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| image->FillBuffer(0);
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| | |
| // Make a square
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| for(unsigned int r = 3; r < 6; r++)
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| {
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| for(unsigned int c = 3; c < 6; c++)
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| {
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| itk::Index<2> pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| | |
| image->SetPixel(pixelIndex, 255);
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| }
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| }
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| }
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| </source>
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| | |
| ==CMakeLists.txt==
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| <source lang="cmake">
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| cmake_minimum_required(VERSION 2.6)
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| | |
| PROJECT(FloodFilledImageFunctionConditionalIterator)
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| include_directories(/home/doriad/ITKWikiExamples/ItkVtkGlue)
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| FIND_PACKAGE(VTK REQUIRED)
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| INCLUDE(${VTK_USE_FILE})
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| FIND_PACKAGE(ITK REQUIRED)
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| INCLUDE(${ITK_USE_FILE})
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| | |
| ADD_EXECUTABLE(FloodFilledImageFunctionConditionalIterator FloodFilledImageFunctionConditionalIterator.cxx /home/doriad/ITKWikiExamples/ItkVtkGlue/QuickView.cxx)
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| TARGET_LINK_LIBRARIES(FloodFilledImageFunctionConditionalIterator
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| vtkHybrid
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| ITKIO ITKBasicFilters ITKCommon
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| )
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| | |
| </source>
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